To install a single new garage door it should cost between $ and $. They demonstrate that the average homeowner can usually tackle such a project in a nine hour time span and a professional will be able to complete it in roughly five hours..A garage door will cost anywhere from $ for single doors to $, for two or more doors, with better materials accounting for the higher cost. Most homeowners report spending about $, for the door and installation..We are the largest garage door installation and garage door opener installation provider in the U.S. Get started on your custom design online today!.